Use for instrument data visualisation

[AlexLyo]

Hello
I want to use LiveChart2 to display instrument data. One of the visualization tasks is to mark the peak with the output of its height, area and other data. The mark of the peak is the drawing of a line between the points of the curve and, preferably, the coloring of the peak.
I tried to use standard tools - for the peak object I took a separate LineSeries, with the same values ​​as the curve, with only one additional point at the end of the sequence coinciding with the first peak point by value (to get a closed contour and fill it color). But at the same time, the line at the end and beginning of the peak looks like the contour of the curve (this is due to the LineSmoothness property. When it is equal to 0, then everything is fine, but not beautiful)